[Vasu]

The universe COULD have been created by using scientific means, But if you think about it, The universe is vast, And infinite, Could there be a possibility that God (?) had put more races into existence before us? Maybe we are just one in a line of many planets that he has made, Why else would we be the only living things in a giant infinite universe?

How do you know we are the only living things in the universe. You've answered your question in your own post. The universe is vast and infinite as you said. We simply have not managed to discover other life, but it could be that there is, and it is very probable that there is, life in other planets. It's pretty self-important to assume otherwise.